/**

 @Name：layui.form 表单组件
 @Author：贤心
 @License：MIT
    
 */
import Layui from '../layui.js'
import JQuery from '../jquery.js'
import Layer from '../layer/layer'

var $ = JQuery
  , layui = Layui
  , layer = Layer
  , hint = layui.hint()
  , device = layui.device()

  , MOD_NAME = 'form', ELEM = '.layui-form', THIS = 'layui-this', SHOW = 'layui-show', HIDE = 'layui-hide', DISABLED = 'layui-disabled'

  , Form = function () {
    this.config = {
      verify: {
        required: [
          /[\S]+/
          , '必填项不能为空'
        ]
        , phone: [
          /^1\d{10}$/
          , '请输入正确的手机号'
        ]
        , email: [
          /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/
          , '邮箱格式不正确'
        ]
        , url: [
          /(^#)|(^http(s*):\/\/[^\s]+\.[^\s]+)/
          , '链接格式不正确'
        ]
        , number: function (value) {
          if (!value || isNaN(value)) return '只能填写数字'
        }
        , date: [
          /^(\d{4})[-\/](\d{1}|0\d{1}|1[0-2])([-\/](\d{1}|0\d{1}|[1-2][0-9]|3[0-1]))*$/
          , '日期格式不正确'
        ]
        , identity: [
          /(^\d{15}$)|(^\d{17}(x|X|\d)$)/
          , '请输入正确的身份证号'
        ]
      }
    };
  };

//全局设置
Form.prototype.set = function (options) {
  var that = this;
  $.extend(true, that.config, options);
  return that;
};

//验证规则设定
Form.prototype.verify = function (settings) {
  var that = this;
  $.extend(true, that.config.verify, settings);
  return that;
};

//表单事件监听
Form.prototype.on = function (events, callback) {
  return layui.onevent.call(this, MOD_NAME, events, callback);
};

//表单控件渲染
Form.prototype.render = function (type, filter) {
  var that = this
    , elemForm = $(ELEM + function () {
      return filter ? ('[lay-filter="' + filter + '"]') : '';
    }())
    , items = {

      //下拉选择框
      select: function () {
        var TIPS = '请选择', CLASS = 'layui-form-select', TITLE = 'layui-select-title'
          , NONE = 'layui-select-none', initValue = '', thatInput

          , selects = elemForm.find('select'), hide = function (e, clear) {
            if (!$(e.target).parent().hasClass(TITLE) || clear) {
              $('.' + CLASS).removeClass(CLASS + 'ed ' + CLASS + 'up');
              thatInput && initValue && thatInput.val(initValue);
            }
            thatInput = null;
          }

          , events = function (reElem, disabled, isSearch) {
            var select = $(this)
              , title = reElem.find('.' + TITLE)
              , input = title.find('input')
              , dl = reElem.find('dl')
              , dds = dl.children('dd')


            if (disabled) return;

            //展开下拉
            var showDown = function () {
              var top = reElem.offset().top + reElem.outerHeight() + 5 - win.scrollTop()
                , dlHeight = dl.outerHeight();
              reElem.addClass(CLASS + 'ed');
              dds.removeClass(HIDE);

              //上下定位识别
              if (top + dlHeight > win.height() && top >= dlHeight) {
                reElem.addClass(CLASS + 'up');
              }
            }, hideDown = function (choose) {
              reElem.removeClass(CLASS + 'ed ' + CLASS + 'up');
              input.blur();

              if (choose) return;

              notOption(input.val(), function (none) {
                if (none) {
                  initValue = dl.find('.' + THIS).html();
                  input && input.val(initValue);
                }
              });
            };

            //点击标题区域
            title.on('click', function (e) {
              reElem.hasClass(CLASS + 'ed') ? (
                hideDown()
              ) : (
                  hide(e, true),
                  showDown()
                );
              dl.find('.' + NONE).remove();
            });

            //点击箭头获取焦点
            title.find('.layui-edge').on('click', function () {
              input.focus();
            });

            //键盘事件
            input.on('keyup', function (e) {
              var keyCode = e.keyCode;
              //Tab键
              if (keyCode === 9) {
                showDown();
              }
            }).on('keydown', function (e) {
              var keyCode = e.keyCode;
              //Tab键
              if (keyCode === 9) {
                hideDown();
              } else if (keyCode === 13) { //回车键
                e.preventDefault();
              }
            });

            //检测值是否不属于select项
            var notOption = function (value, callback, origin) {
              var num = 0;
              layui.each(dds, function () {
                var othis = $(this)
                  , text = othis.text()
                  , not = text.indexOf(value) === -1;
                if (value === '' || (origin === 'blur') ? value !== text : not) num++;
                origin === 'keyup' && othis[not ? 'addClass' : 'removeClass'](HIDE);
              });
              var none = num === dds.length;
              return callback(none), none;
            };

            //搜索匹配
            var search = function (e) {
              var value = this.value, keyCode = e.keyCode;

              if (keyCode === 9 || keyCode === 13
                || keyCode === 37 || keyCode === 38
                || keyCode === 39 || keyCode === 40
              ) {
                return false;
              }

              notOption(value, function (none) {
                if (none) {
                  dl.find('.' + NONE)[0] || dl.append('<p class="' + NONE + '">无匹配项</p>');
                } else {
                  dl.find('.' + NONE).remove();
                }
              }, 'keyup');

              if (value === '') {
                dl.find('.' + NONE).remove();
              }
            };
            if (isSearch) {
              input.on('keyup', search).on('blur', function (e) {
                thatInput = input;
                initValue = dl.find('.' + THIS).html();
                setTimeout(function () {
                  notOption(input.val(), function (none) {
                    if (none && !initValue) {
                      input.val('');
                    }
                  }, 'blur');
                }, 200);
              });
            }

            //选择
            dds.on('click', function () {
              var othis = $(this), value = othis.attr('lay-value');
              var filter = select.attr('lay-filter'); //获取过滤器

              if (othis.hasClass(DISABLED)) return false;

              if (othis.hasClass('layui-select-tips')) {
                input.val('');
              } else {
                input.val(othis.text());
                othis.addClass(THIS);
              }

              othis.siblings().removeClass(THIS);
              select.val(value).removeClass('layui-form-danger')
              layui.event.call(this, MOD_NAME, 'select(' + filter + ')', {
                elem: select[0]
                , value: value
                , othis: reElem
              });

              hideDown(true);
              return false;
            });

            reElem.find('dl>dt').on('click', function (e) {
              return false;
            });

            //关闭下拉
            $(document).off('click', hide).on('click', hide);
          }

        selects.each(function (index, select) {
          var othis = $(this)
            , hasRender = othis.next('.' + CLASS)
            , disabled = this.disabled
            , value = select.value
            , selected = $(select.options[select.selectedIndex]) //获取当前选中项
            , optionsFirst = select.options[0];

          if (typeof othis.attr('lay-ignore') === 'string') return othis.show();

          var isSearch = typeof othis.attr('lay-search') === 'string'
            , placeholder = optionsFirst ? (
              optionsFirst.value ? TIPS : (optionsFirst.innerHTML || TIPS)
            ) : TIPS;

          //替代元素
          var reElem = $(['<div class="layui-unselect ' + CLASS + (disabled ? ' layui-select-disabled' : '') + '">'
            , '<div class="' + TITLE + '"><input type="text" placeholder="' + placeholder + '" value="' + (value ? selected.html() : '') + '" ' + (isSearch ? '' : 'readonly') + ' class="layui-input layui-unselect' + (disabled ? (' ' + DISABLED) : '') + '">'
            , '<i class="layui-edge"></i></div>'
            , '<dl class="layui-anim layui-anim-upbit' + (othis.find('optgroup')[0] ? ' layui-select-group' : '') + '">' + function (options) {
              var arr = [];
              layui.each(options, function (index, item) {
                if (index === 0 && !item.value) {
                  arr.push('<dd lay-value="" class="layui-select-tips">' + (item.innerHTML || TIPS) + '</dd>');
                } else if (item.tagName.toLowerCase() === 'optgroup') {
                  arr.push('<dt>' + item.label + '</dt>');
                } else {
                  arr.push('<dd lay-value="' + item.value + '" class="' + (value === item.value ? THIS : '') + (item.disabled ? (' ' + DISABLED) : '') + '">' + item.innerHTML + '</dd>');
                }
              });
              arr.length === 0 && arr.push('<dd lay-value="" class="' + DISABLED + '">没有选项</dd>');
              return arr.join('');
            }(othis.find('*')) + '</dl>'
            , '</div>'].join(''));

          hasRender[0] && hasRender.remove(); //如果已经渲染，则Rerender
          othis.after(reElem);
          events.call(this, reElem, disabled, isSearch);
        });
      }
      //复选框/开关
      , checkbox: function () {
        var CLASS = {
          checkbox: ['layui-form-checkbox', 'layui-form-checked', 'checkbox']
          , _switch: ['layui-form-switch', 'layui-form-onswitch', 'switch']
        }
          , checks = elemForm.find('input[type=checkbox]')

          , events = function (reElem, RE_CLASS) {
            var check = $(this);

            //勾选
            reElem.on('click', function () {
              var filter = check.attr('lay-filter') //获取过滤器
                , text = (check.attr('lay-text') || '').split('|');

              if (check[0].disabled) return;

              check[0].checked ? (
                check[0].checked = false
                , reElem.removeClass(RE_CLASS[1]).find('em').text(text[1])
              ) : (
                  check[0].checked = true
                  , reElem.addClass(RE_CLASS[1]).find('em').text(text[0])
                );

              layui.event.call(check[0], MOD_NAME, RE_CLASS[2] + '(' + filter + ')', {
                elem: check[0]
                , value: check[0].value
                , othis: reElem
              });
            });
          }

        checks.each(function (index, check) {
          var othis = $(this), skin = othis.attr('lay-skin')
            , text = (othis.attr('lay-text') || '').split('|'), disabled = this.disabled;
          if (skin === 'switch') skin = '_' + skin;
          var RE_CLASS = CLASS[skin] || CLASS.checkbox;

          if (typeof othis.attr('lay-ignore') === 'string') return othis.show();

          //替代元素
          var hasRender = othis.next('.' + RE_CLASS[0]);
          var reElem = $(['<div class="layui-unselect ' + RE_CLASS[0] + (
            check.checked ? (' ' + RE_CLASS[1]) : '') + (disabled ? ' layui-checkbox-disbaled ' + DISABLED : '') + '" lay-skin="' + (skin || '') + '">'
            , {
              _switch: '<em>' + ((check.checked ? text[0] : text[1]) || '') + '</em><i></i>'
            }[skin] || ((check.title.replace(/\s/g, '') ? ('<span>' + check.title + '</span>') : '') + '<i class="layui-icon">' + (skin ? '&#xe605;' : '&#xe618;') + '</i>')
            , '</div>'].join(''));

          hasRender[0] && hasRender.remove(); //如果已经渲染，则Rerender
          othis.after(reElem);
          events.call(this, reElem, RE_CLASS);
        });
      }
      //单选框
      , radio: function () {
        var CLASS = 'layui-form-radio', ICON = ['&#xe643;', '&#xe63f;']
          , radios = elemForm.find('input[type=radio]')

          , events = function (reElem) {
            var radio = $(this), ANIM = 'layui-anim-scaleSpring';

            reElem.on('click', function () {
              var name = radio[0].name, forms = radio.parents(ELEM);
              var filter = radio.attr('lay-filter'); //获取过滤器
              var sameRadio = forms.find('input[name=' + name.replace(/(\.|#|\[|\])/g, '\\$1') + ']'); //找到相同name的兄弟

              if (radio[0].disabled) return;

              layui.each(sameRadio, function () {
                var next = $(this).next('.' + CLASS);
                this.checked = false;
                next.removeClass(CLASS + 'ed');
                next.find('.layui-icon').removeClass(ANIM).html(ICON[1]);
              });

              radio[0].checked = true;
              reElem.addClass(CLASS + 'ed');
              reElem.find('.layui-icon').addClass(ANIM).html(ICON[0]);

              layui.event.call(radio[0], MOD_NAME, 'radio(' + filter + ')', {
                elem: radio[0]
                , value: radio[0].value
                , othis: reElem
              });
            });
          };

        radios.each(function (index, radio) {
          var othis = $(this), hasRender = othis.next('.' + CLASS), disabled = this.disabled;

          if (typeof othis.attr('lay-ignore') === 'string') return othis.show();

          //替代元素
          var reElem = $(['<div class="layui-unselect ' + CLASS + (radio.checked ? (' ' + CLASS + 'ed') : '') + (disabled ? ' layui-radio-disbaled ' + DISABLED : '') + '">'
            , '<i class="layui-anim layui-icon">' + ICON[radio.checked ? 0 : 1] + '</i>'
            , '<span>' + (radio.title || '未命名') + '</span>'
            , '</div>'].join(''));

          hasRender[0] && hasRender.remove(); //如果已经渲染，则Rerender
          othis.after(reElem);
          events.call(this, reElem);
        });
      }
    };
  type ? (
    items[type] ? items[type]() : hint.error('不支持的' + type + '表单渲染')
  ) : layui.each(items, function (index, item) {
    item();
  });
  return that;
};

//表单提交校验
var submit = function () {
  var button = $(this), verify = form.config.verify, stop = null
    , DANGER = 'layui-form-danger', field = {}, elem = button.parents(ELEM)

    , verifyElem = elem.find('*[lay-verify]') //获取需要校验的元素
    , formElem = button.parents('form')[0] //获取当前所在的form元素，如果存在的话
    , fieldElem = elem.find('input,select,textarea') //获取所有表单域
    , filter = button.attr('lay-filter'); //获取过滤器

  //开始校验
  layui.each(verifyElem, function (_, item) {
    var othis = $(this), ver = othis.attr('lay-verify').split('|');
    var tips = '', value = othis.val();
    othis.removeClass(DANGER);
    layui.each(ver, function (_, thisVer) {
      var isFn = typeof verify[thisVer] === 'function';
      if (verify[thisVer] && (isFn ? tips = verify[thisVer](value, item) : !verify[thisVer][0].test(value))) {
        layer.msg(tips || verify[thisVer][1], {
          icon: 5
          , shift: 6
        });
        //非移动设备自动定位焦点
        if (!device.android && !device.ios) {
          item.focus();
        }
        othis.addClass(DANGER);
        return stop = true;
      }
    });
    if (stop) return stop;
  });

  if (stop) return false;

  layui.each(fieldElem, function (_, item) {
    if (!item.name) return;
    if (/^checkbox|radio$/.test(item.type) && !item.checked) return;
    field[item.name] = item.value;
  });

  //获取字段
  return layui.event.call(this, MOD_NAME, 'submit(' + filter + ')', {
    elem: this
    , form: formElem
    , field: field
  });
};

//自动完成渲染
var form = new Form()
  , dom = $(document), win = $(window);

form.render();

//表单reset重置渲染
dom.on('reset', ELEM, function () {
  var filter = $(this).attr('lay-filter');
  setTimeout(function () {
    form.render(null, filter);
  }, 50);
});

//表单提交事件
dom.on('submit', ELEM, submit)
  .on('click', '*[lay-submit]', submit);

export default form


